Revenue Recognition, Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Mar. 31, 2021
Disaggregation of Revenue [Abstract]
Net sales	$ 494.6	$ 347.8
Contract Balances [Abstract]
Contract assets	8.0		$ 5.7
Contract liabilities	7.2		$ 5.6
Increase in contract assets	2.3
Increase in contract liabilities	1.6
Products Transferred at a Point in Time [Member]
Disaggregation of Revenue [Abstract]
Net sales	484.5	340.3
Products Transferred Over Time [Member]
Disaggregation of Revenue [Abstract]
Net sales	22.6	15.4
Americas [Member]
Disaggregation of Revenue [Abstract]
Net sales	242.2	161.3
Europe [Member]
Disaggregation of Revenue [Abstract]
Net sales	204.0	136.2
Asia [Member]
Disaggregation of Revenue [Abstract]
Net sales	60.9	58.2
Commercial HVAC&R [Member]
Disaggregation of Revenue [Abstract]
Net sales	171.7	126.4
Data Center Cooling [Member]
Disaggregation of Revenue [Abstract]
Net sales	26.3	28.8
Industrial Cooling [Member]
Disaggregation of Revenue [Abstract]
Net sales	17.4	11.9
Commercial Vehicle [Member]
Disaggregation of Revenue [Abstract]
Net sales	83.3	48.4
Off-Highway [Member]
Disaggregation of Revenue [Abstract]
Net sales	81.2	54.1
Automotive and Light Vehicle [Member]
Disaggregation of Revenue [Abstract]
Net sales	99.9	67.4
Other [Member]
Disaggregation of Revenue [Abstract]
Net sales	27.3	18.7
Segment Total [Member]
Disaggregation of Revenue [Abstract]
Net sales	507.1	355.7
BHVAC [Member]
Disaggregation of Revenue [Abstract]
Net sales	59.9	47.6
BHVAC [Member] | Products Transferred at a Point in Time [Member]
Disaggregation of Revenue [Abstract]
Net sales	59.9	47.6
BHVAC [Member] | Products Transferred Over Time [Member]
Disaggregation of Revenue [Abstract]
Net sales	0.0	0.0
BHVAC [Member] | Americas [Member]
Disaggregation of Revenue [Abstract]
Net sales	31.5	26.0
BHVAC [Member] | Europe [Member]
Disaggregation of Revenue [Abstract]
Net sales	28.4	21.6
BHVAC [Member] | Asia [Member]
Disaggregation of Revenue [Abstract]
Net sales	0.0	0.0
BHVAC [Member] | Commercial HVAC&R [Member]
Disaggregation of Revenue [Abstract]
Net sales	42.7	32.5
BHVAC [Member] | Data Center Cooling [Member]
Disaggregation of Revenue [Abstract]
Net sales	16.7	15.0
BHVAC [Member] | Industrial Cooling [Member]
Disaggregation of Revenue [Abstract]
Net sales	0.0	0.0
BHVAC [Member] | Commercial Vehicle [Member]
Disaggregation of Revenue [Abstract]
Net sales	0.0	0.0
BHVAC [Member] | Off-Highway [Member]
Disaggregation of Revenue [Abstract]
Net sales	0.0	0.0
BHVAC [Member] | Automotive and Light Vehicle [Member]
Disaggregation of Revenue [Abstract]
Net sales	0.0	0.0
BHVAC [Member] | Other [Member]
Disaggregation of Revenue [Abstract]
Net sales	0.5	0.1
CIS [Member]
Disaggregation of Revenue [Abstract]
Net sales	159.2	122.5
CIS [Member] | Products Transferred at a Point in Time [Member]
Disaggregation of Revenue [Abstract]
Net sales	145.0	109.3
CIS [Member] | Products Transferred Over Time [Member]
Disaggregation of Revenue [Abstract]
Net sales	14.2	13.2
CIS [Member] | Americas [Member]
Disaggregation of Revenue [Abstract]
Net sales	81.8	59.9
CIS [Member] | Europe [Member]
Disaggregation of Revenue [Abstract]
Net sales	70.9	50.9
CIS [Member] | Asia [Member]
Disaggregation of Revenue [Abstract]
Net sales	6.5	11.7
CIS [Member] | Commercial HVAC&R [Member]
Disaggregation of Revenue [Abstract]
Net sales	129.0	93.9
CIS [Member] | Data Center Cooling [Member]
Disaggregation of Revenue [Abstract]
Net sales	9.6	13.8
CIS [Member] | Industrial Cooling [Member]
Disaggregation of Revenue [Abstract]
Net sales	17.4	11.9
CIS [Member] | Commercial Vehicle [Member]
Disaggregation of Revenue [Abstract]
Net sales	0.0	0.0
CIS [Member] | Off-Highway [Member]
Disaggregation of Revenue [Abstract]
Net sales	0.0	0.0
CIS [Member] | Automotive and Light Vehicle [Member]
Disaggregation of Revenue [Abstract]
Net sales	0.0	0.0
CIS [Member] | Other [Member]
Disaggregation of Revenue [Abstract]
Net sales	3.2	2.9
HDE [Member]
Disaggregation of Revenue [Abstract]
Net sales	201.8	123.5
HDE [Member] | Products Transferred at a Point in Time [Member]
Disaggregation of Revenue [Abstract]
Net sales	193.4	121.3
HDE [Member] | Products Transferred Over Time [Member]
Disaggregation of Revenue [Abstract]
Net sales	8.4	2.2
HDE [Member] | Americas [Member]
Disaggregation of Revenue [Abstract]
Net sales	119.6	67.9
HDE [Member] | Europe [Member]
Disaggregation of Revenue [Abstract]
Net sales	41.2	24.1
HDE [Member] | Asia [Member]
Disaggregation of Revenue [Abstract]
Net sales	41.0	31.5
HDE [Member] | Commercial HVAC&R [Member]
Disaggregation of Revenue [Abstract]
Net sales	0.0	0.0
HDE [Member] | Data Center Cooling [Member]
Disaggregation of Revenue [Abstract]
Net sales	0.0	0.0
HDE [Member] | Industrial Cooling [Member]
Disaggregation of Revenue [Abstract]
Net sales	0.0	0.0
HDE [Member] | Commercial Vehicle [Member]
Disaggregation of Revenue [Abstract]
Net sales	79.2	46.3
HDE [Member] | Off-Highway [Member]
Disaggregation of Revenue [Abstract]
Net sales	79.9	53.4
HDE [Member] | Automotive and Light Vehicle [Member]
Disaggregation of Revenue [Abstract]
Net sales	20.4	13.0
HDE [Member] | Other [Member]
Disaggregation of Revenue [Abstract]
Net sales	22.3	10.8
Automotive [Member]
Disaggregation of Revenue [Abstract]
Net sales	86.2	62.1
Automotive [Member] | Products Transferred at a Point in Time [Member]
Disaggregation of Revenue [Abstract]
Net sales	86.2	62.1
Automotive [Member] | Products Transferred Over Time [Member]
Disaggregation of Revenue [Abstract]
Net sales	0.0	0.0
Automotive [Member] | Americas [Member]
Disaggregation of Revenue [Abstract]
Net sales	9.3	7.5
Automotive [Member] | Europe [Member]
Disaggregation of Revenue [Abstract]
Net sales	63.5	39.6
Automotive [Member] | Asia [Member]
Disaggregation of Revenue [Abstract]
Net sales	13.4	15.0
Automotive [Member] | Commercial HVAC&R [Member]
Disaggregation of Revenue [Abstract]
Net sales	0.0	0.0
Automotive [Member] | Data Center Cooling [Member]
Disaggregation of Revenue [Abstract]
Net sales	0.0	0.0
Automotive [Member] | Industrial Cooling [Member]
Disaggregation of Revenue [Abstract]
Net sales	0.0	0.0
Automotive [Member] | Commercial Vehicle [Member]
Disaggregation of Revenue [Abstract]
Net sales	4.1	2.1
Automotive [Member] | Off-Highway [Member]
Disaggregation of Revenue [Abstract]
Net sales	1.3	0.7
Automotive [Member] | Automotive and Light Vehicle [Member]
Disaggregation of Revenue [Abstract]
Net sales	79.5	54.4
Automotive [Member] | Other [Member]
Disaggregation of Revenue [Abstract]
Net sales	$ 1.3	$ 4.9